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B C D
A E F G
H I J
A:Manually draw the ROI of the lacrimal gland on the section with the largest lacrimal gland area in the T2WI sequence(red). B-G:Apply the
ROI to other SyMRI⁃derived images[B:T1 map(pseudo⁃color);C:T2 map(pseudo⁃color);D:PD map(pseudo⁃color);E:Synthetic FLAIR image;
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F:Synthetic STIR image;G:Synthetic DIR image]. H-J:Manually place 5-10 mm ROI(green)on both sides of the temporal muscles respectively to
measure their signal intensity,and use it for the calculation of the signal intensity ratio of the lacrimal gland to the temporal muscle(H:FLAIR image;
I:STIR image;J:DIR image).
图1 泪腺及颞肌ROI勾画示意图
Figure 1 Schematic diagram of ROI delineation for the lacrimal gland and the temporal muscle
表1 活动期与非活动期TAO患者临床参数比较
Table 1 Comparison of clinical characteristics between active and inactive TAO patients
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Variable Active(n=29) Inactive(n=44) t/χ /Z P
Age(years,x ± s) 53.07 ± 12.50 42.16 ± 14.25 -3.357 0.001
Sex(male/female,n/n) 13/16 7/37 7.349 0.007
TAO duration[months,M(P25,P75 )] 7.00(4.50,10.50) 8.00(2.25,14.75) -0.571 0.568
CAS[M(P25,P75 )] 3(3,4) 1(1,1) -7.448 < 0.001
Smoking history(yes/no,n/n) 16/13 22/22 0.187 0.665
FT3[pmol/L,M(P25,P75 )] 4.840(4.205,5.525) 5.015(4.258,6.045) -0.581 0.562
FT4[pmol/L,M(P25,P75 )] 15.300(11.850,22.500) 17.200(14.200,19.300) -0.513 0.608
TSH[mU/L,M(P25,P75 )] 1.610(0.168,6.305) 1.715(0.095,3.005) -0.637 0.524
TRAb[U/L,M(P25,P75 )] 5.410(2.595,12.700) 5.455(1.913,11.800) -0.536 0.592
FT3:free triiodothyronine;FT4:free thyroxine;TSH:thyroid⁃stimulating hormone;TRAb:thyrotrophin receptor antibody.
1.834,P=0.006)均为 TAO 活动性的独立预测因子 子(T1RT 均值、T2RT 均值、PD 最大值、STIR⁃SIR 最
(表2)。 大值)构建的联合模型具有最佳诊断性能(AUC=
2.4 MRI 独立预测因子及其联合模型对 TAO 临床 0.855,灵敏度74.14%,特异度84.09%,图4),其AUC
活动性分期的诊断效能 显著高于单独使用 T1RT 均值(AUC=0.663)、T2RT
ROC 曲线分析显示,采用 4 个 MRI 独立预测因 均值(AUC=0.725)、PD最大值(AUC=0.707)及STIR⁃

